Tampering-preventing device for fire-alarm boxes.



L-KAROLY.

TAMPERING PREVENTING DEVlCE FOR FIRE ALARM BOXES.

APPLICATION FILED APR. 5- I915.

Patented Aug. 10,1915.

I a SHEETSSHEET 1.

Fig.1.

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cohunmm PLANOGRAPH (IO-,WASHINOTON, I:v c.

J. KAROLY.

TAMPERING PREVENTING DEVICE FOR FIRE ALARM BOXES.

APPLICATION FILED APR. 5. 1915.

1,149,199. Patented Aug. 10,1915.

3 SHEETS-SHEET 2.

d2 Karo g coLuMmA PLANOGRAPH C0., WASHINGTON, D. c.

J. KAROLY.

TAMPERING PREVENTING DEVICE FOR FIRE ALARM BOXES.

APPLICATION FILED APR. 5. 1915.

1,149,199. Patented Aug. 10, 1915;

3 SHEETS-SHEET 3'.

(LIE (Lima! COLUMBIA PLANODRAPH 60.,WA5HINOTON. D. c.

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3 JOHN KAROLY, OF CHICAGO, ILLINOIS.

TAMPERING-PREVENTING .DEVIGEFOB FIRE-ALARM BOXES.

Specification of Letters I atent. Patgntgdl Aug, it), 1915,

Application filed April 5, 1915. Serial No. 19,420..

To aZZ whom it may concern: I v

Be it known that I, JoI-IN KARonY, a sub]ec t of the King ofHungary,residing at Chlcago, in'the county of Cook and State of rive and'actuatethe releasing mechanism.

The present invention is designed primarily to prevent tampering withfire alarm boxes and toprevent false alarms from being turned, themechanism being arranged so as to hold the operator of the alarm systemuntil a the department ofiicer arrives and the box being provided withsuch an attachment would render unfounded alarms impracticable. I p

A stillfurtherobject is to provide the fire alarm boxes of a cityfire'department with looking meansen gaging the Wrist of a person whooperates'the a'larmfbox, thus holdmg said person at'the box untll thefire department oiiicer arrives and aseertains the location of thefire,or in theevent that a false alarm has been turned in, an arrest is madeof the person tampering with the alarm.

d/Viththese general objects in viewand others that wil l appear as thenature of the invention is better understood, the same consists in thenovel combination and arrangement of parts hereinafter more fullydescribed, illustrated in the accompanying drawings, and pointed out inthe appended claims. s s I 111 the drawings forming a' part or thisapplication. and in which "like-designating characters refer tocorresponding parts throughout the several views, Figurel is a verticalsectional viewtaken throughthe device upon line 1- 1 of Fig. 2 showingthe elements in their normal set positions. Fig. 2 is a sectional viewtaken upon line Il.1r

of Fig. 1. Fig. 3 is a horizontal sectional view taken upon line III-IIIof Fig. 1, and Fig. 4 is an enlarged detail sectional view of one of thelocking members in its sprung or arm-engaging position.

Referring more 111 detail to the drawings,

a hollow casing is provided for completely inelosmg the fire alarm box11, the casing box belng mounted upon a permanent support whereverdesired such as being secured to a post of a building. l he forward side12 of the casing has a cylindrical sleeve 13 horizontally arrangedtherethrough, and being of suficientsize' to accommodate the arm of aman and to allow a person to insert his hand therethrough into'thecasing 10 for the purpose of turning the key or switch 14: of the alarmbox and thereby turning in the alarm. I

Arnrengaging feet 15 are provided upon the innerends or bars 16 whichare longitudinally slidable within spaced brackets 17 and 18 within thecasing 10, the said bars and feet being positioned throughoppositelyarranged peripheral openings 19 in the col.- lar 13. A trip pin 20 isslidablyarranged within the bracket 18 and is normally pro: jectedthrough an opening 21 in the bracket by means of a spring 22 carried bythe bracket and so as to engage the adjacent face of thebar 16. When thebar l6is moved outwardly to the limit .of its movement, the foot 15 willfit within its respective opening 19, the edges of each foot and openingbeing inclined to correspond and thus providing an unbroken innersurface for the collar as shown in Figs. 1 and 2. When the bars are sopositioned outwardly in their unlocked arrangement, the pins 20 willautomatically enter the side notches '23 of the said bars, thus lockingthe bars in their normal posi-, tion. to each of the bars 15, and alsoto the adja cent brackets 17 as at 2-6 andwhereby as will be evident areleasing of the trip pin 20 from" the bar notch 23 allows itsrespective spring Bate force the bar feet 15-inwardly v totheirfloclringpositions. p i

Each of thebrackets l7 are'provided with looking pins27 whichar epressed inwardly by means of springs 28 and so as to engage A coilspring 24 is securedas at 25 I v the adjacent faeeof the-bars v16 withthe teeth 29 thereof. The operation ofthe springs 24 thereby move thetoothed portions of the bars 16 in a ratcheting move ment beneath thepins 27 which pins will prevent any unauthorized retraction of the barsand feet.

Each of the trip pins 20 are provided with cords which are attached'asat 31 to a pulley 32 mountediupon a turn shaft 38 extending through thecasing 10 and having the end thereof opposite the said pulley pro videdwith a ratchet wheel 3and a sprocket 7 wheel 35.

A dog 86 is carried by the box 11 for engaging the ratchet wheel 3a,while a sprocket chain 39 runs over the sprocket wheel 35 and a, furthersprocket wheel 38 which is carried by the shank 89 of the operating key14; of the box. I a I 7 From this detailed description of the invention,the complete operation thereof will be at once apparent The mechanism isnormally'arranged as shown in Figs. 1 and 2 and a person desiring toturn me fire alarm projectshis hand and forearm through the collar 13and turns the key 1 1 with his hand-thereby setting the alarm mechanismin operation. I Such action also turns the 41 thereof so that freeaccesswill be had vent the removal ofhis hand from the casing 10. Thefiredepartment being advisedby means of the system of the location ofthe alarm box, the proper oiiicer visits the box, and may releasetheperson sendingin the alarm, The end doors of the casing 10 may then beopened by releasing thelocks tothe interior of the casing and the bars16 may again be retracted for engagement by thetr'ip pins 41, and theentire device reset by the proper turning of the key 141.

While the form of the invention herein shown and described is what isbelieved to be the preferred embodiment thereof, it is nevertheless tobe understood that minor changes may be made without departing from thespirit and scope of the invention as set forth in the claims.

What I claim as new is 1. An alarm box, an operating ,key

mounted thereon, an inclosing casing for the said box, an arm receivingcollar extending through one sldeof the sa1d box and having radlalopenmgs therethrough,

' radially arranged slidably mounted locking bars carried by the saidcasing and extending through the said openings, resilient locking pins1n engagement withthe said bars, trip'pins in looking engagement with(lopies of this patent may be obtained-for the said bars when the latterare in their normal positions, releasing cords between 7 the said trippins and the said key, and projectionsprings in operative engagementwith the saidbarsl I 2. A device of the class described comating keycarried thereby, a sprocket wheel upon 'thesaid key, an inclosing casingfor the said box, an arm receiving collar extending through one side ofthe said casing and provided withoppositely-arranged openings withinsaid casing, a turn shaft extending through the sa1d. casing andadacentthe sa1d box, a ratchet. wheel, a

sprocket wheel and a pulleyupon the said shaft, a sprocketchain inengagementwith the sa1d sprocket wheels, a dogcarrled by the said box inengagement with the said ratchet wheel, arm engaging means extendmgthrough the-sa1d collar openings, bar- [prising a fire alarm box, arevoluble operengaging trip pins, and trip cords connected between thesaidr pulley andtrip pins.

.-3.--A device of, the class described comprising a fire alarm box, arevoluble operating key carried thereby, a sprocket wheel uponthesaidkey, an inclosing casing for the said box, an arm receiving collarex-Q tending through one side of the casing and provided withoppositely-arranged openings within said caslng, aturn shaft ex tendingthrough the said casing and adjacent the said box, a ratchet wheel,asprocket wheel; and a pulley upon the said shaft, a

'sprock-etchain inengagement with the said sprocket wheels, .a dogcarriedby the said box in engagement with the said ratchet wheel,brackets arranged in pairs within said casing, radially slidable barsmounted within the said brackets having ratchet. teeth, and a stop notchin one side thereof.

and extending through the said collar openings, arm engaging feet uponthe inner ends of the said bars, a reslhently mounted lockmg pm earnedby one bracket of each pair in engagement with the said teeth, a pro-'jection spring for each of the said bars,

spring-pressed trip pins carried by the others of the said brackets innormal engagement' with the saidbar notches when the bars and feet arein'their normal set positions, and releasing cords operatively connectedbetween the said trip pins and pulley.

' In testimony whereof I affix my signature in presence oftwo'witnesses. v V JOHN KAROLY. e Witnesses: PAUL V. AVER,

'BAURGAN.

five cents each, by addressing the Commissioner-of Patents,

'Washington, D. G. a

